Integrity is rumored to be coming with all black option but cannot get any information on timing. May be option when you need them.. Otherwise, the interiors can be painted.

+1. I would check with them as well. After that, perhaps one of the other Canadian fiberglass manufacturers. Have you considered thermally broken aluminum? There are some threads on here with some great manufacturers that do get Energy Star ratings.

As as side note, there are some cellular PVC options that have a paintable interior as well. I wouldn't worry about expansion as that concern is vastly overstated when it comes to a well engineered product.

Builder has some contacts at Marvin and is trying to track down that rumor. That would make things easy if they offer black. Otherwise, it seems like several companies offer aluminum clad with black interior and exteriors. Who would you pros consider as best in the aluminum clad world? I see that suppliers in the area deal with Kolbe, Windsor, Semco. Marvin, Andersen-E, and Sierra Pacific.

Kolbe, Marvin, E-series by Andersen would be the choices I would look at from that list.

Most contractors we interviewed said both our interior and exterior wood was in good condition as was our interior moulding so ripping it all out for new construction would not be worth it in their opinions. They said a properly installed replacement window would seal and insulate new windows very well.

we had a few rotted sills but each contractor said they are easy to repair or replace without spending all that extra money for new construction windows.

since they all do new construction and obviously make money from it, they seemed sincere and honest with their opinion to do a standard replacement. Since most of our windows are 32 inches wide, glass loss would not be an issue either. We lose a little but not much .